Above top is a reproduction of Texas cave art dated at as much as 8 thousand years ago. The large bird depicted in this piece has been described as a "turkey".

That's probably correct, but given the relative size of the bird (and our pencahnt for speculation) it reminded us of a photo of a "thunderbird" that had been shot and photographed on a (Texas?) ranch in the 1950's. Above, cclick and drag to enlarge.Specifically, a smallish Rhamphorhynchoidea [long-tailed] pterosaur.

True enough, its starting to look turkeyish too us a bit more now, but we can't discount the fact that it is near lunchtime.